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RE: Odd tuner behaviour in two Yamaha receivers.

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BFitz

In Reply to: RE: Odd tuner behaviour in two Yamaha receivers. posted by Quadzilla on December 20, 2020 at 11:34:50

Both those units have the same FM tuner section, with 3 gangs and 2 ceramic filters. They use the Yamaha CSL tuning circuit, which is found on other Yamaha tuners that came later.
Most likely, it needs one or both adjustments -
* detector balance (set to zero)
* IF offset

Both are detailed in the service manual.

Follow Ups:

RE: Odd tuner behaviour in two Yamaha receivers. - Quadzilla 05:59:25 12/24/20 (2)
Thank you. I will check it out, but my electronic skills are limited. Often these manuals talk about the specs, but they assume that you know where and how to check them.
- RE: Odd tuner behaviour in two Yamaha receivers. - Rod M 20:06:07 12/27/20 (1)
  I suspect that BFitz is right. If it's an analog tuner, then they've drift a bit. You wouldn't notice 102.1 vs 102.2 exactly on a dial. I thing that the analog is tuning in correctly, but tells the digital otherwise.
  
  If assuming it sounds fine, then do you care if it's off by .1?
  
  Aligning it might work to get it in sync. The question is whether is worth it?
  
  My old Yamaha 2500 just lost it's HDMI output which is strange. I'm pondering the same question. Is it worth it to figure out why?
  
  -Rod
  - RE: Odd tuner behaviour in two Yamaha receivers. - Quadzilla 06:27:44 12/28/20 (0)
    I can live with the display, but I would fix it if it was something simple. I was selling the R-50 though, and I know that many buyers suffer from AudiOCD and stuff like this bothers them. Oddly enough though, it clears up if you leave the receiver plugged in.
    
    HDMI is a scourge. I have held onto my Yamaha RX-V1500 for a long time because I didn't want to deal with HDMI, and I don't use those inputs on my Arcam AV9 because I know it would only be a matter of time before they get wonky.

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